These are six O'Reilly animal Guides in CD-ROM format, which are designed to be easily accessible by any Web browser, presented here as: Perl in a Nutshell (with hard copy), Programming Perl, The Perl Cookbook, Perl 5 Pocket Reference, Learning Perl, and Learning Perl for Windows 32 Systems. Formatted in HTML, The Perl CD Bookshelf can be accessed with any Web browser. The books are fully searchable and cross-referenced. in addition, there are individual indexes for each book, and a master index for the whole library.